raptop changed the topic of #principia to: READ THE FAQ: http://goo.gl/gMZF9H; The current version is Gateaux. We currently target 1.8.1, 1.9.1, and 1.10.1. <scott_manley> anyone that doubts the wisdom of retrograde bop needs to get the hell out | https://xkcd.com/323/ | <egg> calculating the influence of lamont on Pluto is a bit silly… | <egg> also 4e16 m * 2^-52 is uncomfortably large
<_whitenotifier-8975>
[Principia] 13-potatos-why closed issue #2810: Request for Lighter version of principia. - https://git.io/JIOTO
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<discord->
Stonesmile. — @Butcher Having only a `style` and no `colour` in a line config crashes the game on save load. Is this intended, or should it use the default colour?
<discord->
Butcher. — This is intended, you need to provide both or neither.
<discord->
Stonesmile. — Okey, just wanted to make sure that it's working as intended
<discord->
Butcher. — Think I have worked out better interplanetary launches, at last I might get to Mercury...
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<discord->
Ashnoom. — How much does 'using principia' change the non-principia dV maps?
<raptop>
quasi-hohmann transfers remain quasi-hohmann, however you can eggsploit things like the weak stability boundary and interplanetary superhighway
<discord->
Ashnoom. — so if a 'the' dV map for RSS has a mercury transfer listed for 5kdV, then it'll be 5kdV even in principia, give or take.
<discord->
Ashnoom. — (not that I am there yet, still doing sounding rockets, soooooo)
<raptop>
yeah
<discord->
Stonesmile. — In most cases it will be quite close, maby less dV if anything, most of the time
<raptop>
Also, reminder that Δv cost for a sounding rocket at an altitude of 1 planet radius is about the same as getting into orbit
<discord->
Ashnoom. — (I am trying out principia for the first time, so, yeah. Probably will be here a few times asking questions 🙂 )
<discord->
Butcher. — 5k would be a particularly favourable transfer to mercury.
<discord->
Stonesmile. — TWP or MJ transfer planner is still usable for getting an approximate dV for transfers, but you have to plan them on your own
<discord->
Butcher. — I'm finding twp actually pretty useful now I have worked out how to drive it
<discord->
Skylar (She/Her). — I have never heard the term "interplanetary superhighway" before lol
<raptop>
Apparently it's more commonly "Interplanetary Transport Network" or the like
<discord->
starman. — so the gateway would be at the L1 point? confusing it has the same name as the NASA one
<discord->
Stonesmile. — This was a 2001 paper
<raptop>
It's possible that the NASA one's name was inspired by this
<discord->
Butcher. — Hmm o should set up L4/5 lunar relays they don't need much station keeping right?
<discord->
Butcher. — Hmm I should set up L4/5 lunar relays they don't need much station keeping right? (edited)
<discord->
Stonesmile. — Haven't you tried that already? Or was that some one else?
<discord->
Butcher. — I did L2
<discord->
Butcher. — I considered it before but lacked the comms tech
<discord->
Stonesmile. — *Right,* it needs quite powerful comms
<discord->
Butcher. — A couple of largish x band dishes should serve though.
<discord->
Stonesmile. — L4/5 might be handy, since they are stable(?)
<discord->
Butcher. — Yes exactly.
<discord->
Butcher. — I think there is still a comms shadow on the far side but minor.
<discord->
Stonesmile. — Each relay extends the 'visible' longitudes by 60 deg, right?
<discord->
Butcher. — I have some spare vab coming up soon.
<discord->
Stonesmile. — 300 deg isn't too bad 👍
<discord->
SRFirefox. — Playing with Lagrange points sounds awesome. I guess I'll have to convince my aerospace CGN friends to help me plan missions in it
<discord->
Butcher. — That's at ground level, you'll get better coverage in orbit.
<discord->
SRFirefox. — (Control, Guidance, and Navication)
<discord->
Butcher. — I have a couple of orbiting relays as well to pick up slack.
<discord->
badgermasher. — I did some L4/L5 relays, should have something in #missionreports. It's pretty easy to get them in 'place' for a long time without station keeping. But they will tend to wander around quite a bit so you get less than an extra 60 degrees sometimes and othertimes more.
<discord->
SRFirefox. — Three com sats in halo orbits would probably get the remaining coverage pretty wlel.
<discord->
Butcher. — I did a far side manned rover which managed full comms on two polar relays.
<discord->
Butcher. — But it's a bit timing dependent.
<raptop>
Assuming I ran the numbers correctly, L4/L5 sats give you 100% coverage for anything above 1059 km (in Earth orbit)
* raptop
ignores horsehoe and tadpole orbits
<discord->
Stonesmile. — What about the altitude above the moon?
<discord->
Butcher. — Lower one assumes.
<raptop>
yeah, it has to be lower since the moon is smaller
<discord->
Standecco. — I'm assuming the answer is yes, but would I be able to use Principia as evidence (with hindsight knowing that GR is mostly correct) for Mercury's missing perihelion precession, when compared with experimental data?
<raptop>
274 km?
<raptop>
Standecco: yes, also pleroy wrote a test related to that
<discord->
Standecco. — how long until we can test quantum loop gravity and string theory in their cosmological aspects to check if they fix dark matter?
<discord->
Paculino. — Why isn't pleroy here?
<discord->
Paculino. — Depends if doing so allows tachyonic antitelephones
<discord->
Paculino. — Depends if doing so allows tachyonic antitelephones;
<discord->
Paculino. — If it does, then yesterday (edited)
<discord->
Standecco. — I assume people that get this much done while having a full time job don't waste much time
<discord->
Paculino. — Makes sense
<raptop>
Reminder that first Principia would need to simulate QM and Maxwell's Egguations
<raptop>
(This would be cool because it would also mean that the YORP effect would work)
<discord->
Paculino. — Would it also imply Relativity being implemented?
<discord->
Paculino. — Makes sense (but sounds stressful) (edited)
<discord->
SRFirefox. — Folks, I *like* egg. Please don't tempt them to set themselves on fire with math.